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Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Sun Apr 08, 2018 1:40 pm
by jkenny23
Lylou2 wrote:Hello, did enybody tried to make power bank for from 18650 batteries for nissan leaf 2011 or later and just put in baggage back, couse if to colculate that one cell f.eg. 18650PF is 10,7w/h so to get 10kwlh of extra energy you need aprox 960 cells and of ourse connect it in 96s10p plius BMS, so it's gonna be aprox 50kg and 20ltr pack which takes only 10 cm of baggage space down inside, and the price to get these nice cells aprox 1800 euros. Does somebody tried to make something like this? And for me most interesting to know how does the main computer of the car react to it or does just discharge/charge goes 2 times slower then before? Couse to make like this battery is wery easy couse I made before much of el. bicycle batteries.


There is a detailed discussion about doing this here: viewtopic.php?f=8&t=6522&start=250

I've temporarily made a 48V/1500W "power bank" which I can charge my car with via 110V EVSE to get an additional 4-5 miles in an emergency. It's only ~70% efficient (1.4 kWH from the power bank, 1.0 kWH to the Leaf battery).

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Sun Apr 08, 2018 1:42 pm
by LeftieBiker
This is the topic you want. Go to halfway down the page.

http://www.mynissanleaf.com/viewtopic.php?f=8&t=6522&start=240

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Wed Apr 25, 2018 2:31 am
by ilie3000
i have a Leaf from 2011 (24kw) with 89000 km, and my battery is 9 bar capacity
i found a battery 30kw from dissasembly, and i want to know if is possible to move cell from new battery to old one, without have any problem with bms or charging new 30kw modules.
does anybody make this 30kw movement to old battery? i read all posts in this thread and I don't fint anything with new 30kw modules.

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Wed Apr 25, 2018 3:12 am
by LeftieBiker
The 30kwh modules are in a different, 'double' configuration, and are not compatible with the 24kwh modules on an individual basis. It might not even be wise to use them if it were possible, because they degrade so quickly in even slightly hotter climates. You might be able to sell those double modules to an electric motorcycle or bicycle builder. They have been used successfully (as have the 24kwh modules) in the Vectrix VX-1 motorcycle, as a replacement for the original NiMH cells. If you actually bought the salvaged pack I may be able to put you in touch with someone looking for them for a Vectrix.

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Wed Apr 25, 2018 10:49 pm
by ilie3000
I don't want to mix 24kw modules with 30kw , i ask if i replace all 48old modules with new 30kw modules, use old bms, and the question: it is possible or anybody try this?

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Wed Apr 25, 2018 11:07 pm
by cwerdna
ilie3000 wrote:I don't want to mix 24kw modules with 30kw , i ask if i replace all 48old modules with new 30kw modules, use old bms, and the question: it is possible or anybody try this?

Battery capacity is measured in kWh, not "kw".

ilie3000 wrote:i read all posts in this thread and I don't fint anything with new 30kw modules.

It's already been stated the discharge curve of the cells in the 30 kWh packs is different than 24 kWh packs. Example: viewtopic.php?p=508480#p508480. See the replies that followed, as well. I guess you missed this.

Frankly, if you can't get the units right, I doubt you're qualified to do the work yourself.

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Tue Jun 26, 2018 2:00 pm
by Atkam

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Sat Jun 30, 2018 1:23 pm
by NiallDarwin
cwerdna wrote:
ilie3000 wrote:I don't want to mix 24kw modules with 30kw , i ask if i replace all 48old modules with new 30kw modules, use old bms, and the question: it is possible or anybody try this?

Battery capacity is measured in kWh, not "kw".

ilie3000 wrote:i read all posts in this thread and I don't fint anything with new 30kw modules.

It's already been stated the discharge curve of the cells in the 30 kWh packs is different than 24 kWh packs. Example: http://www.mynissanleaf.com/viewtopic.p ... 80#p508480. See the replies that followed, as well. I guess you missed this.

That doesn't show its not possible, that shows that the voltage curve is different. Your fuel/range will display inaccurately but that's no problem really.
However, there's an easier way which doesn't involve messing with modules. Take the complete battery inc BMS and the matching VCM:
http://www.mynissanleaf.com/viewtopic.p ... 30#p517865


Frankly, if you can't get the units right, I doubt you're qualified to do the work yourself.


Dude, that's a bit harsh. Its pretty easy to miss that h off kWh, frankly its a stupid unit more-or less designed to confuse. I don't think anyone would have been misled by the lack of to h's there. If you've got nothing constructive to say, best to say nothing at all.

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Sat Jun 30, 2018 5:58 pm
by cwerdna
NiallDarwin wrote:Dude, that's a bit harsh. Its pretty easy to miss that h off kWh, frankly its a stupid unit more-or less designed to confuse. I don't think anyone would have been misled by the lack of to h's there. If you've got nothing constructive to say, best to say nothing at all.

The person got it wrong every single time (at least 8 of them). I know the difference and yet I am NOT qualified. My major was in my university's school of engineering and applied science but I'm no EE nor an electrician.

We're talking about a pack that weighs over 600 pounds (almost 300 kg) and with deadly voltages inside. When someone keeps getting units of electricity wrong, I question how qualified they are.

We've already seen enough differences between different "generations" of 24 kWh packs. Doesn't seem likely interchangeability/compatibility of modules w/older ones was a design goal for parts for/within a 30 kWh pack vs. a 24.

Re: Anybody with 2011 or 2012 interested in upgrade to new battery?

Posted: Sat Jun 30, 2018 6:46 pm
by NiallDarwin
cwerdna wrote:
NiallDarwin wrote: If you've got nothing constructive to say, best to say nothing at all.


That's where I'm leaving it :D